Radial drill



2 Sheets-Sheet 1.

(No Model.)

A. MILL.

RADIAL DRILL.

No. 557,004. Patented Mar. 24, 1896.

AN DREW EGRMMM. PHOTO-UTHWASHINtz-I'DNJC.

2 Sheets-Sheet 2.

(No Model.)

A. MILL.

RADIAL DRILL.

Patented Mar. 24, 1896.

I ANDRDN RGRAHAM.PNUU-UTHQWASMINGTDILD C UNITED STATES PATENT OFFICE.

ANTON MILL, OF CINCINNATI, OHIO.

RADIAL DRILL.

SPECIFICATION forming part of Letters Patent No. 557,004, dated March24, 1896. Application nea May 2,1895. serai No. 547,906. oro model.)

To all whom it may concern,.-

Be it known that I, ANTON MILL, residing at Cincinnati, in the county ofHamilton and State of Ohio, have invented certain new and usefulImprovements in Radial Drills, of which the following is aspecification.

The object of my invention is, first, to provide, in a radial drill, thecombination of a stationary bed and a revolving column, a rotary andradially-adj ust-able table which may be brought into use and set at anydesired angle or thrown out of use, and a stationary table employed asdesired.

Another object of my invention is to provide improved means forvertically adjusting the radial-drill arm.

Another object of my invention is to provide improved means for feedingthe radialdrill spindle and throwing the same out of gear.

Another object of my invention is to provide improved means for changingthe speed of the drill.

The features of my invention will be more fully set forth in thedescription Vof the accompanying drawings, making a part of thisspecification, in which- Figure l is a plan view of my improvement. Fig.2 is a side elevation partly in section. Fig. 3 is an enlarged plan viewof the mechanism for driving the drill-spindle and adjusting thedrill-arm. Fig. 4 is a top plan view of the changeable gear for drivingthe spindle. Fig. 5 is a section on line y y, Fig. 4. Fig. G is asect-ion on line .fr Fig. 4. Fig. 7 is a plan view of the clamping-ring.Fig. 8 is a central vertical section of Fig. 7. Fig. 9 is a sect-ion online z z, Fig. 2.

A represents the bed-plate of the machine, the base of which forms afixed table upon which the work may be support-ed.

B represents the main driving-shaft, which is provided with the usualbevel-gear meshing with the bevel-gear on shaft C and driving the same.

D represents a stationary column, upon which is supported the rotarycolumn E and the sleeve-journal F for the adjustable table G. Said tableG has an axial support upon the flange g of the sleeve F by means of thevertical flange f, so that the table G may be adjusted radially upon itscenter.

Gl represents a supplemental table supported upon the shaft' h, whichjournals 'in a bearing formed in the table G.

The table G and its sustaining-sleeve F are radially adjustable upon theupright stationary column D, which forms a journal-support for therotary sleeve E.

J represents an adjustable bracket for supporting the outer end of thetable G. This is made readily movable, so as to allow the readyadjustment of said table.

K represents a vertically and radially adjusting drill-arm. It issecured to the sleeve I, which is clamped upon the rotary column E,sleeve I being vertically adjustable upon the rotary column E andrevoluble therewith.

The mechanism for driving the drill-spindle and for adjusting the arm Kvertically is mounted upon the top of said column-sleeve E and isconstructed as follows: 1 represents the main gear upon the shaft C. 2represents a transmitting-gear mounted upon the same shaft. 3 representsa shifting-gear mounted upon the arm of bell-crank lever 4, whichcenters upon the vertically-adjusting screwrod 5 that engages with thethread of collar I'. 6 represents a transmitting-gear which meshes withand is` driven by the transmitting-gear 3, so that when thetransmittinggear 3 is in contact with the gear 2 the screwrod 5 isturned and it adjusts the collar I and itsarm K vertically in onedirection.

.In order to reverse the direction of the screwrod 5, I provide thefollowing mechanisms: 7 represents a change-gear with which gear 3 isconnected when the motion is to be shifted. Upon the shaft of this gearis mounted gear 8, which is in mesh with and constantly driven by gearl. When gear 3 is in contact with gear 7, it being in mesh at all timeswith gear 6, it transmits motion in the opposite direction to screw-rod5. Shaft 9, on which gear 8 is mounted, likewise drives and transmitsmotion to the transverse shaft by the usual form of miter-gear, and thisin turn drives the shaft L which drives the drill-spindle M by means ofthe changeable transmittinggears m n r s t, which are brought into meshIOO alternately with the gear P of the drill-spindle M in the followingmanner:

Q represents a stud-shaft supported on the top of the head-stock R. Tothis shaft is pivoted the tumbler-plate S, upon one arm of which ismounted transmitting-gear s and upon the other arm thetransmitting-gears t r. Then the parts are in the position shown in Fig.4L, the `drill-spindle is driven by gears m tr P. Then it is desired toincrease the speed, the tumbler-plate is moved so as to bring the gearssin contact with the gears n P, when the drill-spindle M is driven bythe gears n s P. When in the position shown in Fig. 1, gear s isdisengaged from gears n P, and when gears is in contact with gears n Pthe gears r t are disengaged from gears m P. In order to hold the saidtumbler-plate S in any adjusted position, I provide the followinginstrumentalities: U :represents a segment which is provided with aseries of notches with which the lug u of the adjusting-lever V isadjustably connected. A material advantage is obtained by the use ofthis changeable gear, as the speed of the drill may be changed withoutstopping the same. It has hitherto been customary to make the changethrough the main drivinggear; but by the construction of the headstockherein shown and by mounting the change-gear thereon the speed of thedrill may be easily changed without stopping the operation of themachine.

If it is desired to stop the operation of the drill-spindle temporarily,the tumbler-plate S is moved so as to bring both gears r s oui of meshwith the gear P, and the lock-lever holds it in that position, instantlystopping the operation of the drill.

In order to furnish an automatic feed for the drill-spindle and meansfor throwing it out of gear automatically, I provide the followingdevices: Upon the base of the headstock I mount a feeding-shaft 7, whichis driven by a belt from the spindle M. Y represents a clutch whichforms a connection between the shaftW and loosely-journaled gear 10 uponthe lower end thereof. Gear 10 meshes with and drives gear 11 on shaft12, which also carries a hand-wheel 13, so that the said shaft may beturned by hand when the clutch is unshipped. 14- represents a worm onsaid shaft 12, meshing with the worm-wheel 15, which carries a pinionthat meshes with the rack 1G attached to the sleeve 17, in which thedrillspindle M journals. 1S represents a trip-pin placed on 011e side ofthe rack 1G andyertieally adjustable thereon so as to regulate the timeof tripping. To throw out the automatic feed, this trip is adapted tocome into engagement with the tripping-lever 19, which is in engagementwith the clutch-head, so that when said lever is depressed by thecontact of the tripping-pin with its front end the clutch is unshippedfrom engagement with its coaeting member and the feed thrown out ofgear. Then in this position the drill may be fed vertically byhand-wheel 13.

It is very desirable to have the rotary column E rigidly held inposition after the radial adjustment of the drill-arm is made. Toaecomplish this I provide the following instrum entalities: Z representsa split ring which is grooved to fit upon dovetailed bevels formed uponthe foot of the rotary column E and upon the base of the column II, sothat when said split ring is drawn together by the clampingnuts 2O therotary column is securely locked to the stationary column. The dovetailform of this connection is made for the purpose of more securely drawingthe parts together, as it takes less strain upon the clamping-screws tohold the parts in this position than if the faces of the parts wereplain; but either form is within the scope of my invention.

I claim- 1. In a radial drill, the combination with the column D, of thetable G provided with the rotary column E journa-led on the base of thecolumn I), the split ring Z forming a journalsupport for the revolublecolumn E, the driving-shaft C journaled within said columns, theadjustable drill-arm K journaling on the sleeve F, the threaded rod 5engaging with said sleeve, and driving-gear mounted upon the top of saidshaft D and rod 5, substantially as and for the purpose specified.

2. In combination with the drill-arm K the head-stock R laterallyadjustable thereon, thc changeable driving-gear for driving thedrillspindle journaled therein, consisting of the gears m, n, P, mountedupon the shafts L and M journaled in said head-stock, a tumblerplate Spivoted on said head-stock and carrying shipping-gears r, s, thefeed-shaft W, the clutch Y operating feed-gears 10, worm 14,worm-wheel15 operating the rack 1G of shaft M, and the tripping-pin 18and trippinglever 10 engaging the clutch Y of shaft W, substantially asdescribed.

In combination with the head-stock R of a radial drill, the changeabledriving-gear for driving the drill-spindle journaled therein, consistingof the gears m, n, P, mounted upon shafts journaled in said head-stock,a tumbler-plate S pivoted on said head and carrying shipping-gears r, s,t, a lever V pivoted to said tumbler-plate and carrying a lug a and asegmentU arranged on the head-stock and adapted for engagement by saidlug to lock the tumbler-plate in its adjusted position, substantially asdescribed.

In testimony whereof I have hereunto set my hand.

ANTON MILL.

Iitncsses W. R. Woon, C. 'f. MILES.

IOO

IIO

IZO

